diff --git a/pkg/cli/portfolio_analyst_workflow_contract_test.go b/pkg/cli/portfolio_analyst_workflow_contract_test.go
index dd4b73db75a..3acaf499a42 100644
--- a/pkg/cli/portfolio_analyst_workflow_contract_test.go
+++ b/pkg/cli/portfolio_analyst_workflow_contract_test.go
@@ -12,6 +12,7 @@ import (
 // unconfirmed-numeric Sentry fields.  The tokens below are the stable contract
 // surface; changing them requires updating both the workflow source and this test.
 func TestPortfolioAnalystAvoidsInvalidSentryAggregations(t *testing.T) {
+	t.Parallel()
 	content, err := os.ReadFile(filepath.Join("..", "..", ".github", "workflows", "portfolio-analyst.md"))
 	if err != nil {
 		t.Fatalf("failed to read portfolio analyst workflow source: %v", err)
@@ -47,6 +48,7 @@ func TestPortfolioAnalystAvoidsInvalidSentryAggregations(t *testing.T) {
 // The tokens below are the stable contract surface; changing them requires
 // updating both the shared import and this test.
 func TestSharedSentryImportFailsFastOnRepeatedQuery400s(t *testing.T) {
+	t.Parallel()
 	content, err := os.ReadFile(filepath.Join("..", "..", ".github", "workflows", "shared", "mcp", "sentry.md"))
 	if err != nil {
 		t.Fatalf("failed to read shared Sentry MCP import: %v", err)
diff --git a/pkg/cli/pr_automerge_test.go b/pkg/cli/pr_automerge_test.go
index b5651c596e6..95796e2fd74 100644
--- a/pkg/cli/pr_automerge_test.go
+++ b/pkg/cli/pr_automerge_test.go
@@ -11,6 +11,7 @@ import (
 // TestWaitForWorkflowCompletionUsesSignalHandling verifies that WaitForWorkflowCompletion
 // uses the signal-aware polling helper, which provides Ctrl-C support
 func TestWaitForWorkflowCompletionUsesSignalHandling(t *testing.T) {
+	t.Parallel()
 	// This test verifies that the function uses PollWithSignalHandling
 	// by checking that it times out correctly (a key feature of the helper)
 
@@ -30,6 +31,7 @@ func TestWaitForWorkflowCompletionUsesSignalHandling(t *testing.T) {
 // propagates cancellation when the context is cancelled, so callers (e.g. the repeat loop)
 // can detect an intentional interruption and stop immediately.
 func TestWaitForWorkflowCompletion_ContextCancellation(t *testing.T) {
+	t.Parallel()
 	ctx, cancel := context.WithCancel(context.Background())
 	// Cancel immediately so the poll loop exits on the first ctx.Done() check.
 	cancel()
diff --git a/pkg/cli/pr_code_quality_reviewer_workflow_contract_test.go b/pkg/cli/pr_code_quality_reviewer_workflow_contract_test.go
index fab39809424..0eb2445304e 100644
--- a/pkg/cli/pr_code_quality_reviewer_workflow_contract_test.go
+++ b/pkg/cli/pr_code_quality_reviewer_workflow_contract_test.go
@@ -13,6 +13,7 @@ import (
 )
 
 func TestPRCodeQualityReviewerWorkflowSubAgentModelContract(t *testing.T) {
+	t.Parallel()
 	repoRoot, err := gitutil.FindGitRoot()
 	if err != nil {
 		t.Skipf("Skipping test: not in a git repository: %v", err)
diff --git a/pkg/cli/pr_command_test.go b/pkg/cli/pr_command_test.go
index b1a48a10598..222efaff69d 100644
--- a/pkg/cli/pr_command_test.go
+++ b/pkg/cli/pr_command_test.go
@@ -12,6 +12,7 @@ import (
 )
 
 func TestParsePRURL(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name      string
 		url       string
@@ -86,6 +87,7 @@ func TestParsePRURL(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
 			owner, repo, prNumber, err := parser.ParsePRURL(tt.url)
 
 			if tt.wantErr {
@@ -140,6 +142,7 @@ func TestPullRequestSupportsTransferAndAutomergeJSON(t *testing.T) {
 
 // TestNewPRCommand tests that the PR command is created properly
 func TestNewPRCommand(t *testing.T) {
+	t.Parallel()
 	cmd := NewPRCommand()
 
 	if cmd.Use != "pr" {
@@ -170,6 +173,7 @@ func TestNewPRCommand(t *testing.T) {
 
 // TestNewPRTransferSubcommand tests that the transfer subcommand is created properly
 func TestNewPRTransferSubcommand(t *testing.T) {
+	t.Parallel()
 	cmd := NewPRTransferSubcommand()
 
 	if cmd.Use != "transfer <pr-url>" {
diff --git a/pkg/cli/pr_description_caveman_workflow_contract_test.go b/pkg/cli/pr_description_caveman_workflow_contract_test.go
index 62a8740cedd..8cea47065f3 100644
--- a/pkg/cli/pr_description_caveman_workflow_contract_test.go
+++ b/pkg/cli/pr_description_caveman_workflow_contract_test.go
@@ -13,6 +13,7 @@ import (
 )
 
 func TestPRDescriptionCavemanWorkflowSubAgentModelContract(t *testing.T) {
+	t.Parallel()
 	repoRoot, err := gitutil.FindGitRoot()
 	if err != nil {
 		t.Skipf("Skipping test: not in a git repository: %v", err)
diff --git a/pkg/cli/pr_prefetch_cache_contract_test.go b/pkg/cli/pr_prefetch_cache_contract_test.go
index 4144822ba91..ca1bf6f991a 100644
--- a/pkg/cli/pr_prefetch_cache_contract_test.go
+++ b/pkg/cli/pr_prefetch_cache_contract_test.go
@@ -13,6 +13,7 @@ import (
 )
 
 func TestSharedPRDiffDataFetchValidatesHeadSHAForCacheHit(t *testing.T) {
+	t.Parallel()
 	repoRoot, err := gitutil.FindGitRoot()
 	if err != nil {
 		t.Skipf("Skipping test: not in a git repository: %v", err)
@@ -29,6 +30,7 @@ func TestSharedPRDiffDataFetchValidatesHeadSHAForCacheHit(t *testing.T) {
 }
 
 func TestTopReviewWorkflowsHaveHeadAwarePRDataCacheKeys(t *testing.T) {
+	t.Parallel()
 	repoRoot, err := gitutil.FindGitRoot()
 	if err != nil {
 		t.Skipf("Skipping test: not in a git repository: %v", err)
@@ -51,6 +53,7 @@ func TestTopReviewWorkflowsHaveHeadAwarePRDataCacheKeys(t *testing.T) {
 }
 
 func TestImpeccableSkillsReviewerHasDeterministicSkillSelectionGuidance(t *testing.T) {
+	t.Parallel()
 	repoRoot, err := gitutil.FindGitRoot()
 	if err != nil {
 		t.Skipf("Skipping test: not in a git repository: %v", err)
diff --git a/pkg/cli/project_command_test.go b/pkg/cli/project_command_test.go
index 6201b4a388f..95838934020 100644
--- a/pkg/cli/project_command_test.go
+++ b/pkg/cli/project_command_test.go
@@ -16,6 +16,7 @@ import (
 )
 
 func TestNewProjectCommand(t *testing.T) {
+	t.Parallel()
 	cmd := NewProjectCommand()
 	require.NotNil(t, cmd, "Command should be created")
 	assert.Equal(t, "project", cmd.Use, "Command name should be 'project'")
@@ -25,6 +26,7 @@ func TestNewProjectCommand(t *testing.T) {
 }
 
 func TestNewProjectNewCommand(t *testing.T) {
+	t.Parallel()
 	cmd := NewProjectNewCommand()
 	require.NotNil(t, cmd, "Command should be created")
 	assert.Equal(t, "new <title>", cmd.Use, "Command usage should be 'new <title>'")
@@ -43,6 +45,7 @@ func TestNewProjectNewCommand(t *testing.T) {
 }
 
 func TestProjectConfig(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name        string
 		config      ProjectConfig
@@ -80,6 +83,7 @@ func TestProjectConfig(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
 			assert.NotEmpty(t, tt.config.Title, "Project title should not be empty")
 			assert.NotEmpty(t, tt.config.Owner, "Project owner should not be empty")
 			assert.NotEmpty(t, tt.config.OwnerType, "Owner type should not be empty")
@@ -89,6 +93,7 @@ func TestProjectConfig(t *testing.T) {
 }
 
 func TestProjectNewCommandArgs(t *testing.T) {
+	t.Parallel()
 	cmd := NewProjectNewCommand()
 
 	tests := []struct {
@@ -115,6 +120,7 @@ func TestProjectNewCommandArgs(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
 			err := cmd.Args(cmd, tt.args)
 			if tt.shouldErr {
 				assert.Error(t, err, "Should return error for invalid arguments")
@@ -126,6 +132,7 @@ func TestProjectNewCommandArgs(t *testing.T) {
 }
 
 func TestProjectNewCommandFlags(t *testing.T) {
+	t.Parallel()
 	cmd := NewProjectNewCommand()
 
 	// Check standard flags
@@ -149,6 +156,7 @@ func TestProjectNewCommandFlags(t *testing.T) {
 }
 
 func TestParseProjectURL(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name           string
 		url            string
@@ -187,6 +195,7 @@ func TestParseProjectURL(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
 			result, err := parseProjectURL(tt.url)
 			if tt.shouldErr {
 				assert.Error(t, err, "Should return error for invalid URL")
@@ -201,6 +210,7 @@ func TestParseProjectURL(t *testing.T) {
 }
 
 func TestEnsureSingleSelectOptionBefore(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name           string
 		options        []singleSelectOption
@@ -262,6 +272,7 @@ func TestEnsureSingleSelectOptionBefore(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
 			result, changed := ensureSingleSelectOptionBefore(tt.options, tt.desired, tt.beforeName)
 			assert.Equal(t, tt.expectChanged, changed, "Changed status should match expectation")
 			assert.Len(t, result, tt.expectedLength, "Result length should match")
@@ -290,6 +301,7 @@ func TestEnsureSingleSelectOptionBefore(t *testing.T) {
 }
 
 func TestSingleSelectOptionsEqual(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name     string
 		a        []singleSelectOption
@@ -341,6 +353,7 @@ func TestSingleSelectOptionsEqual(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
 			result := singleSelectOptionsEqual(tt.a, tt.b)
 			assert.Equal(t, tt.expected, result, "Equality check should match expectation")
 		})
@@ -348,6 +361,7 @@ func TestSingleSelectOptionsEqual(t *testing.T) {
 }
 
 func TestProjectConfigWithProjectSetup(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name        string
 		config      ProjectConfig
diff --git a/pkg/cli/redacted_domains_test.go b/pkg/cli/redacted_domains_test.go
index 115f88e379f..9f0b9401511 100644
--- a/pkg/cli/redacted_domains_test.go
+++ b/pkg/cli/redacted_domains_test.go
@@ -12,6 +12,7 @@ import (
 )
 
 func TestParseRedactedDomainsLog(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name            string
 		logContent      string
@@ -70,6 +71,7 @@ func TestParseRedactedDomainsLog(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
 			// Create a temporary file with the test content
 			tmpDir := t.TempDir()
 			logPath := filepath.Join(tmpDir, "redacted-urls.log")
@@ -100,6 +102,7 @@ func TestParseRedactedDomainsLog(t *testing.T) {
 }
 
 func TestParseRedactedDomainsLog_FileNotFound(t *testing.T) {
+	t.Parallel()
 	_, err := parseRedactedDomainsLog("/nonexistent/path/redacted-urls.log", false)
 	if err == nil {
 		t.Error("expected error for non-existent file, got nil")
@@ -107,6 +110,7 @@ func TestParseRedactedDomainsLog_FileNotFound(t *testing.T) {
 }
 
 func TestAnalyzeRedactedDomains_DirectPath(t *testing.T) {
+	t.Parallel()
 	tmpDir := t.TempDir()
 	logContent := "example.com\ntest.org\n"
 	logPath := filepath.Join(tmpDir, "redacted-urls.log")
@@ -129,6 +133,7 @@ func TestAnalyzeRedactedDomains_DirectPath(t *testing.T) {
 }
 
 func TestAnalyzeRedactedDomains_AgentOutputsPath(t *testing.T) {
+	t.Parallel()
 	tmpDir := t.TempDir()
 	agentOutputsDir := filepath.Join(tmpDir, "agent_outputs")
 	if err := os.MkdirAll(agentOutputsDir, 0755); err != nil {
@@ -156,6 +161,7 @@ func TestAnalyzeRedactedDomains_AgentOutputsPath(t *testing.T) {
 }
 
 func TestAnalyzeRedactedDomains_FullArtifactPath(t *testing.T) {
+	t.Parallel()
 	tmpDir := t.TempDir()
 	fullPath := filepath.Join(tmpDir, "agent_outputs", "tmp", "gh-aw")
 	if err := os.MkdirAll(fullPath, 0755); err != nil {
@@ -183,6 +189,7 @@ func TestAnalyzeRedactedDomains_FullArtifactPath(t *testing.T) {
 }
 
 func TestAnalyzeRedactedDomains_NoLogFile(t *testing.T) {
+	t.Parallel()
 	tmpDir := t.TempDir()
 
 	analysis, err := analyzeRedactedDomains(tmpDir, false)
@@ -196,6 +203,7 @@ func TestAnalyzeRedactedDomains_NoLogFile(t *testing.T) {
 }
 
 func TestAnalyzeRedactedDomains_RecursiveSearch(t *testing.T) {
+	t.Parallel()
 	tmpDir := t.TempDir()
 	// Create a nested directory structure
 	nestedDir := filepath.Join(tmpDir, "some", "nested", "path")
@@ -228,6 +236,7 @@ func TestAnalyzeRedactedDomains_RecursiveSearch(t *testing.T) {
 }
 
 func TestRedactedDomainsAnalysis_ConsoleRendering(t *testing.T) {
+	t.Parallel()
 	// Test that the Domains field is rendered in console output
 	analysis := &RedactedDomainsAnalysis{
 		TotalDomains: 3,
@@ -253,6 +262,7 @@ func TestRedactedDomainsAnalysis_ConsoleRendering(t *testing.T) {
 }
 
 func TestRedactedDomainsLogSummary_ConsoleRendering(t *testing.T) {
+	t.Parallel()
 	// Test that the Domains field in RedactedDomainsLogSummary is rendered in console output
 	summary := &RedactedDomainsLogSummary{
 		TotalDomains: 2,
@@ -271,6 +281,7 @@ func TestRedactedDomainsLogSummary_ConsoleRendering(t *testing.T) {
 }
 
 func TestRedactedDomainsAnalysis_EmptyDomains(t *testing.T) {
+	t.Parallel()
 	// Test that empty domains list is handled correctly (omitempty)
 	analysis := &RedactedDomainsAnalysis{
 		TotalDomains: 0,
diff --git a/pkg/cli/repo_error_messages_test.go b/pkg/cli/repo_error_messages_test.go
index 8f18905907e..49c43360f2e 100644
--- a/pkg/cli/repo_error_messages_test.go
+++ b/pkg/cli/repo_error_messages_test.go
@@ -9,6 +9,7 @@ import (
 
 // TestRepoSlugErrorMessages verifies that repository slug format errors include examples
 func TestRepoSlugErrorMessages(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name            string
 		repoSlug        string
@@ -54,6 +55,7 @@ func TestRepoSlugErrorMessages(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
 			// Test ensureTrialRepository function
 			err := ensureTrialRepository(tt.repoSlug, "", false, false, false)
 
@@ -74,6 +76,7 @@ func TestRepoSlugErrorMessages(t *testing.T) {
 
 // TestParseRepoSpecErrorMessages verifies that parseRepoSpec errors include examples
 func TestParseRepoSpecErrorMessages(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name            string
 		repoSpec        string
@@ -107,6 +110,7 @@ func TestParseRepoSpecErrorMessages(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
 			_, err := parseRepoSpec(tt.repoSpec)
 
 			if err == nil {
diff --git a/pkg/cli/run_input_validation_test.go b/pkg/cli/run_input_validation_test.go
index c07f1b36da2..484b0d13c07 100644
--- a/pkg/cli/run_input_validation_test.go
+++ b/pkg/cli/run_input_validation_test.go
@@ -10,6 +10,7 @@ import (
 )
 
 func TestGetWorkflowInputs(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name          string
 		lockContent   string
@@ -73,6 +74,7 @@ jobs:
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
 			// Create a temporary directory
 			tmpDir := t.TempDir()
 			tmpFile := filepath.Join(tmpDir, "test-workflow.md")
@@ -115,6 +117,7 @@ jobs:
 }
 
 func TestValidateWorkflowInputs(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name             string
 		lockContent      string
@@ -309,6 +312,7 @@ jobs:
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
 			// Create a temporary directory
 			tmpDir := t.TempDir()
 			tmpFile := filepath.Join(tmpDir, "test-workflow.md")
diff --git a/pkg/cli/run_workflow_tracking_test.go b/pkg/cli/run_workflow_tracking_test.go
index d4656ef013d..6d96d1c230d 100644
--- a/pkg/cli/run_workflow_tracking_test.go
+++ b/pkg/cli/run_workflow_tracking_test.go
@@ -9,6 +9,7 @@ import (
 
 // TestWorkflowRunInfo tests the WorkflowRunInfo struct
 func TestWorkflowRunInfo(t *testing.T) {
+	t.Parallel()
 	// Test struct initialization
 	runInfo := WorkflowRunInfo{
 		URL:        "https://github.com/owner/repo/actions/runs/123456",
@@ -37,6 +38,7 @@ func TestWorkflowRunInfo(t *testing.T) {
 
 // TestWorkflowRunInfo_EmptyValues tests handling of empty values
 func TestWorkflowRunInfo_EmptyValues(t *testing.T) {
+	t.Parallel()
 	// Test with empty values - should be valid
 	runInfo := WorkflowRunInfo{
 		URL:        "",
@@ -56,6 +58,7 @@ func TestWorkflowRunInfo_EmptyValues(t *testing.T) {
 
 // TestWorkflowRunInfo_StatusValues tests various status values
 func TestWorkflowRunInfo_StatusValues(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name       string
 		status     string
@@ -90,6 +93,7 @@ func TestWorkflowRunInfo_StatusValues(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
 			runInfo := WorkflowRunInfo{
 				URL:        "https://github.com/owner/repo/actions/runs/123456",
 				DatabaseID: 123456,
@@ -110,6 +114,7 @@ func TestWorkflowRunInfo_StatusValues(t *testing.T) {
 
 // TestWorkflowRunInfo_TimestampHandling tests timestamp handling
 func TestWorkflowRunInfo_TimestampHandling(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name      string
 		createdAt time.Time
@@ -139,6 +144,7 @@ func TestWorkflowRunInfo_TimestampHandling(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
 			runInfo := WorkflowRunInfo{
 				URL:        "https://github.com/owner/repo/actions/runs/123456",
 				DatabaseID: 123456,
@@ -156,6 +162,7 @@ func TestWorkflowRunInfo_TimestampHandling(t *testing.T) {
 
 // TestWorkflowRunInfo_URLFormats tests various URL formats
 func TestWorkflowRunInfo_URLFormats(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name string
 		url  string
@@ -180,6 +187,7 @@ func TestWorkflowRunInfo_URLFormats(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
 			runInfo := WorkflowRunInfo{
 				URL:        tt.url,
 				DatabaseID: 123456,
diff --git a/pkg/cli/run_workflow_validation_test.go b/pkg/cli/run_workflow_validation_test.go
index c58d7a64668..b618b917dd6 100644
--- a/pkg/cli/run_workflow_validation_test.go
+++ b/pkg/cli/run_workflow_validation_test.go
@@ -13,6 +13,7 @@ import (
 )
 
 func TestGetLockFilePath(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name         string
 		markdownPath string
@@ -32,6 +33,7 @@ func TestGetLockFilePath(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
 			result := getLockFilePath(tt.markdownPath)
 			assert.Equal(t, tt.expected, result)
 		})
@@ -39,6 +41,7 @@ func TestGetLockFilePath(t *testing.T) {
 }
 
 func TestIsRunnable_WithLockFile(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name           string
 		markdownFile   string
@@ -160,6 +163,7 @@ jobs:
 }
 
 func TestGetWorkflowInputs_WithLockFile(t *testing.T) {
+	t.Parallel()
 	tests := []struct {
 		name          string
 		markdownFile  string